发电机励磁控制系统的无静差最优控制

在设计发电机励磁控制系统调节器时,通常假设发电机的调速器不动作,即认为发电机输入机械功率不变.事实上这一假设在发电机运行过程中是不成立的.本文指出发电机输入机械功率是励磁控制系统的一个扰动量,并基于这一物理事实,提出了发电机无静差最优励磁调节器的设计构想,即在通常的状态调节器中增设发电机端电压偏差的积分反馈.从理论上较好地解决了该调节器的设计方法,使得设计过程简易而有条理.文中给出了设计实例,并进行了数字仿真,其结果是令人满意的.

NON-STEADY-STATE DEVIATION OPTIMAL CONTROL OF SYNCHRONOUS GENERATOR EXCITATION SYSTEM

When we design excitation regulators,we assume that the governor would not operate traditionally.This means the machine power of the turbine would not change when the excitation regulater is working.In fact,the assumption does not conform to reality,so this paper points out a fact that the machine power of the turbine is the perturbation to the generator excitation sys- tem.On the basis of this fact,the author proposes a conception of designing an output non-steady-state deviation optimal excitation regulator,which is to introduce an integrated feedback link of the generator terminal voltage deviation into a usual-state feedback regulator. The method of how to design this optimal excitation regulator has been given in this paper and it is both simple and orderly.An example in this paper shows that the conception is correct and the re- sult of digital simulation is satisfactory.